Hi Vivian,
Actually I think regrowth is rare for both surgery and radiation. We'll know more and more as years go on about regrowth rates years down the line with radiation, but I think both are in the single percentiles.
Recovery is all in how you look at it. With surgery, in the majority of cases, most of your recovery is crammed into the first couple of months, and in fact other than balance, in the first 2 to 4 weeks. Facial issues can be ongoing if that nerve becomes damaged. With radiation, there can be swelling on and off for up to 2 years (the number I've heard most often here), but can usually be treated with steroids. Not everyone that gets radiation has 2 years of symptoms, it's just one of the possibilities. I would consider surgery to be the short term recovery and the radiation the longer term. It is true, however, that you can go back to your "normal" life much more quickly with radiation, so in that sense I suppose it seems quicker.
Ernie